The Bolkow Bo 208 aircraft departed from Navan Airfield (EIHH) at 06.35 hrs with the Pilot’s intention to fly to Biggin Hill, UK (EGKB). A short time after take-off the aircraft canopy opened in flight. The Pilot, who was the sole occupant, carried out a forced landing in a nearby field. The aircraft canopy shattered and the aircraft sustained damage to the tailplane. The Pilot was uninjured.